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Nouveaux polymères conjugués dérivés de 4-cyano-3-alcoxythiophènes et de dialcoxythiénothiophènes

Abstract : This work deals with the synthesis of new polymers using alkoxythiophene derivatives. After a rapid review on the linear conjugated systems properties, a first part is devoted to the presentation of several polyalkoxythiophenes reported in literature. the electronic and structuring effects of the alkoxy groups on the properties og conjugated systems are demonstrated.
the second part describes the synthesis of new donner/acceptor systems and the preparation of the resulting polymers. The introduction of electron releasing (alkoxy) and the electron withdrawing (nitrile) groups on the same thiophene ring is used to increase the electronic density homogeneity and to prepare low bandgap polymers.
the last part is devoted to the synthesis of 3,6-dialkoxythiéno[3,2-b]thiophene and de 3,4-dialkoxythiéno[3,2-b]thiophene, wich associate the intrinsically rigid structure of thienothiophenes and the autorigidification due to the presence of alkoxy groups. The two structure leads to systems presenting very different properties, thus allowing the modulation of the electronic properties of the various conjugatede systems.
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Submitted on : Thursday, December 11, 2008 - 3:58:26 PM
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  • HAL Id : tel-00346440, version 1

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Noémie Hergué. Nouveaux polymères conjugués dérivés de 4-cyano-3-alcoxythiophènes et de dialcoxythiénothiophènes. Chimie. Université d'Angers, 2007. Français. ⟨tel-00346440⟩

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